Extending the number of instruction bits in processors with fixed length instructions, in a manner compatible with existing code
US7340588B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2003 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Dec 3, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/30185
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention pertains to apparatus, method and a computer program stored on a computer readable medium. The computer program includes instructions for use with an instruction unit having a code page, and has computer program code for partitioning the code page into at least two sections for storing in a first section thereof a plurality of instruction words and, in association with at least one instruction word, for storing in a second section thereof an extension to each instruction word in the first section. The computer program further includes computer program code for setting a state of at least one page table entry bit for indicating, on a code page by code page basis, whether the code page is partitioned into the first and second sections for storing instruction words and their extensions, or whether the code page is comprised instead of a single section storing only instruction words.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.